while (!need_resched())
barrier();
+ preempt_enable_no_resched();
schedule();
+ preempt_disable();
check_pgt_cache();
}
}
/*
* the idle loop on a UltraMultiPenguin...
+ *
+ * TIF_POLLING_NRFLAG is set because we do not sleep the cpu
+ * inside of the idler task, so an interrupt is not needed
+ * to get a clean fast response.
+ *
+ * XXX Reverify this assumption... -DaveM
+ *
+ * Addendum: We do want it to do something for the signal
+ * delivery case, we detect that by just seeing
+ * if we are trying to send this to an idler or not.
*/
-#define idle_me_harder() (cpu_data(smp_processor_id()).idle_volume += 1)
-#define unidle_me() (cpu_data(smp_processor_id()).idle_volume = 0)
void cpu_idle(void)
{
+ cpuinfo_sparc *cpuinfo = &local_cpu_data();
set_thread_flag(TIF_POLLING_NRFLAG);
+
while(1) {
if (need_resched()) {
- unidle_me();
- clear_thread_flag(TIF_POLLING_NRFLAG);
+ cpuinfo->idle_volume = 0;
+ preempt_enable_no_resched();
schedule();
- set_thread_flag(TIF_POLLING_NRFLAG);
+ preempt_disable();
check_pgt_cache();
}
- idle_me_harder();
+ cpuinfo->idle_volume++;
/* The store ordering is so that IRQ handlers on
* other cpus see our increasing idleness for the buddy
* redistribution algorithm. -DaveM
*/
- membar("#StoreStore | #StoreLoad");
+ membar_storeload_storestore();
}
}
panic("Halt failed!");
}
-EXPORT_SYMBOL(machine_halt);
-
void machine_alt_power_off(void)
{
if (!serial_console && prom_palette)
panic("Reboot failed!");
}
-EXPORT_SYMBOL(machine_restart);
-
static void show_regwindow32(struct pt_regs *regs)
{
struct reg_window32 __user *rw;
struct thread_info *t = p->thread_info;
char *child_trap_frame;
-#ifdef CONFIG_DEBUG_SPINLOCK
- p->thread.smp_lock_count = 0;
- p->thread.smp_lock_pc = 0;
-#endif
-
/* Calculate offset to stack_frame & pt_regs */
child_trap_frame = ((char *)t) + (THREAD_SIZE - (TRACEREG_SZ+STACKFRAME_SZ));
memcpy(child_trap_frame, (((struct sparc_stackf *)regs)-1), (TRACEREG_SZ+STACKFRAME_SZ));
t->flags = (t->flags & ~((0xffUL << TI_FLAG_CWP_SHIFT) | (0xffUL << TI_FLAG_CURRENT_DS_SHIFT))) |
- _TIF_NEWCHILD |
(((regs->tstate + 1) & TSTATE_CWP) << TI_FLAG_CWP_SHIFT);
+ t->new_child = 1;
t->ksp = ((unsigned long) child_trap_frame) - STACK_BIAS;
t->kregs = (struct pt_regs *)(child_trap_frame+sizeof(struct sparc_stackf));
t->fpsaved[0] = 0;